Question

how russian social Democratic workers of st.Petersburg in 1914?

Answer 1

Bolsheviks formed in 1903 from the major split in the RSDLP which also produced the Mensheviks. This faction followed Vladimir Lenin, and organized a separate party, the Russian Social Democratic Workers Party, aka Russian Social Democratic Labour Party (Bolsheviks) in 1912. After the October Revolution, it became the Communist Party of the Soviet Union.